<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>regist</title>
</head>
<body>
    <form action="/bdp1/RequestDemo4" method="post">
        <input type="text" placeholder="请输入用户名" name="username"> <br><br>
        <input type="password" placeholder="请输入密码" name="password"> <br><br>
        <input type="checkbox" name="hobby" value="唱">唱
        <input type="checkbox" name="hobby" value="跳">跳
        <input type="checkbox" name="hobby" value="rap">rap <br><br>
        <input type="submit" value="提交">
    </form>
</body>
</html>